Electrochromic film material and electrochromic film device prepared therefrom

Abstract

The invention belongs to the technical field of electrochromic devices, particularly relates to a novel electrochromic film material, and further discloses an electrochromic film device prepared by the novel electrochromic film material. According to the electrochromic film device provided by the invention, the electrochromic film material is prepared by taking a high adhesive-property composition and a redox-type liquid-state electrochromic composition as raw materials for the first time, and the redox-type liquid-state electrochromic composition is dispersed and cured between conductive substrates by a curing reaction of the high adhesive-property composition. After a test, electrochromic response time of the electrochromic film device prepared by the invention is between 7-11 seconds, number of cycles is between 14-160,000 times, and color difference b value is between −20 and +30. It has a high color changing speed, long service life and stable performance, with a maximum cycle life reaching 160,000 times, and has good application performance.

The invention claimed is: 
     
       1. An electrochromic film material, comprising a high adhesive-property composition and a redox-type liquid-state electrochromic composition, and the mass ratio of the high adhesive-property composition to the redox-type liquid-state electrochromic composition is 1:0.01-50;
 the high adhesive-property composition comprises following components in parts by weight: 
 1-60 parts by weight of a resin to weight of the high adhesive-property composition, wherein the resin comprises an acrylate resin, a polyurethane resin, a polyester resin or an epoxy resin: 
 0.01-50 parts by weight of a monomer to weight of the high adhesive-property composition, wherein the monomer comprises an acrylic monomer, an acrylate monomer, a vinyl monomer, an epoxy monomer or an epoxy acrylate monomer; 
 0.01-50 parts by weight of a crosslinking agent to weight of the high adhesive-property composition, wherein the crosslinking agent comprises a polyfunctional functional monomer; 
 0.001-5 parts by weight of an initiator to weight of the high adhesive-property composition, wherein the initiator comprises a photo initiator or a thermal initiator, and 
 0.001-0.01 parts by weight of a spacer to weight of the high adhesive-property composition, wherein the spacer comprises rigid microbeads between 10 microns to 100 microns in diameter to control the distance between two conductive substances; 
 the redox-type liquid-state electrochromic composition comprises the following components in parts by weight, 
 0.01-10 parts by weight of an electrochromic material to weight of the redox-type liquid-state electrochromic composition, wherein the electrochromic material comprises an electrochromic material a high organic molecule, small organic molecule, and a metal oxide or metal complex; 
 0.01-10 parts by weight of an ion storage material to weight of the redox-type liquid-state electrochromic composition, wherein the ion storage material comprises a compound selected from the group consisting of vanadium pentoxide, tungsten oxide, cerium oxide, indium tin oxide, Prussian blue, polyaniline, triphenylamine, phenazine and viologen; 
 50.01-102.5 parts by weight of a liquid electrolyte material to weight of the redox-type liquid-state electrochromic composition, wherein the liquid electrolyte material consists of 50-99 parts by weight of a liquid conductive medium to weight of the liquid electrolyte material and 0.1-3.5 parts by weight of an electrolyte salt to weight of the liquid electrolyte material; 
 the liquid conductive medium comprises a liquid organic solvent, an ionic liquid or a gel-like crosslinked polymer material; 
 the electrolyte salt is selected from at least one of lithium perchlorate, lithium hexafluorophosphate, lithium tetrafluorophosphate, lithtum bis(oxalate)borate, lithium diimine, and lithium bis(trifluoromethylsulfonyl)imide; 
 the high organic molecule electrochromic material is selected from at least one of polythiophene, polypyrrole, and polyaniline; 
 the small organic molecule electrochromic material is selected from one of viologen compounds, triphenylamine, triphenylamine derivatives, carbazole, carbazole derivatives, anthraquinone, anthraquinone derivatives, phenothiazine and phenothiazine derivatives; 
 the metal oxide electrochromic material is a transition metal oxide selected from vanadium pentoxide, tungsten oxide, cerium oxide and indium tin oxide; and 
 the metal complex is selected from one of Prussian blue, Prussian black, Prussian white, Prussian green, and nitrosyl oxygen-containing molybdenum complexes. 
 
     
     
       2. An electrochromic film device, comprising two layers of conductive substrates, and the electrochromic film material according to  claim 1 , wherein the electrochromic film material is cured between the two layers of conductive substrates. 
     
     
       3. The electrochromic film device according to  claim 2 , wherein the conductive substrate comprises an indium tin oxide conductive glass, an indium tin oxide conductive film, a silver nanowire conductive film, a fluorinated doped tin oxide glass, or a polymer conductive film.